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Forging process of extrusion roller of cement roller press

A technology of extrusion rolls and cement rolls, which is applied in the field of forging, can solve problems such as unfavorable inclusions, large diameters of extrusion roll parts, and ultra-standard ultrasonic flaw detection, achieving good continuity and compactness, strong thermal fatigue resistance, The effect of long service life

Inactive Publication Date: 2019-02-22
JIANGSU JINYUAN FORGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The split structure is prone to problems such as lateral deviation of the roller sleeve and the roller core, interference and looseness during the production process, and the use effect is not good. The cement roller press using the integral forged extrusion roller has obvious advantages. However, due to Extrusion roller parts have large diameter and short length, and the overall forged extrusion roller has great limitations, which is not conducive to the control of the shape of inclusions in the steel. It is easy to form small cavities and cracks around sheet-like inclusions and inclusions in the cold working process. Ultrasonic flaw detection is prone to exceed the standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of forging process of extrusion roller of cement roller press, it is characterized in that: comprise following process step:

[0015] a. Casting blank steel ingot, the weight percentage of chemical composition in the steel ingot is: C: 0.35%, Si: 1.5%, Al: 20%, Mg: 0.022%, Mn: 0.2%, Cr: 0.005%, W: 0.5%, Nb: 0.0055%, V: 0.5%, Cu: 1.0%, Ti: 0.15%, B: 0.25, Fe: 0.8%, Mo: 0.5%, S: 0.6%, the balance is Zn and unavoidable impurities, casting The temperature of the formed steel ingot is lowered to 320°C, then heated to 600°C, kept for 3 hours, cooled to 300°C, kept for 3 hours, reheated to 650°C, kept for 10 hours, cooled to 400°C at 45°C / hour, and then Cool to 150°C at 25°C / hour;

[0016] b. Heat the steel ingot completed in step a to 1160 °C, perform the first upsetting, and draw it by WHF method. The height-to-diameter ratio after drawing is controlled at 2.0, and the total forging ratio is 2.0; the anvil width when drawn by WHF method Ratio W / H=0.6, material width...

Embodiment 2

[0023] A kind of forging process of extrusion roller of cement roller press, it is characterized in that: comprise following process step:

[0024] a. Casting blank steel ingot, the weight percentage of chemical composition in the steel ingot is: C: 0.4%, Si: 2%, Al: 22%, Mg: 0.03%, Mn: 0.35%, Cr: 0.008%, W: 1%, Nb: 0.006%, V: 1%, Cu: 1.3%, Ti: 0.2%, B: 0.3%, Fe: 0.9%, Mo: 0.8%, S: 0.09%, the balance is Zn and unavoidable impurities, The temperature of the cast steel ingot is lowered to 320°C, then heated to 650°C, kept for 4 hours, cooled to 300°C, kept for 3 hours, reheated to 690°C, kept for 10 hours, cooled to 400°C at 45°C / hour, Then cool to 150°C at 25°C / hour;

[0025] b. Heat the steel ingot completed in step a to 1200 °C, perform the first upsetting, and draw it by WHF method. The height-to-diameter ratio after drawing is controlled at 2.1, and the total forging ratio is 2.15; the anvil width when drawn by WHF method Ratio W / H=0.7, material width ratio B / H=0.90, arra...

Embodiment 3

[0032] A kind of forging process of extrusion roller of cement roller press, it is characterized in that: comprise following process step:

[0033] a. Casting blank steel ingot, the weight percentage of chemical composition in the steel ingot is: C: 0.45%, Si: 2.5%, Al: 23%, Mg: 0.032%, Mn: 0.38%, Cr: 0.01%, W: 1.5%, Nb: 0.0065%, V: 1.5%, Cu: 1.5%, Ti: 0.25%, B: 0.35%, Fe: 1%, Mo: 0.9%, S: 0.1%, the balance is Zn and unavoidable impurities, The temperature of the cast steel ingot is lowered to 320°C, then heated to 700°C, kept for 5 hours, cooled to 300°C, kept for 3 hours, reheated to 750°C, kept for 10 hours, cooled to 400°C at 45°C / hour, Then cool to 150°C at 25°C / hour;

[0034] b. Heat the steel ingot completed in step a to 1230°C, carry out the first upsetting, and draw it by WHF method. The height-to-diameter ratio after drawing is controlled at 2.2, and the total forging ratio is 2.2; the anvil width when drawn by WHF method Ratio W / H=0.8, material width ratio B / H=1.0...

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PUM

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Abstract

The invention relates to a forging process of an extrusion roller of a cement roller press. The forging process is characterized by comprising the following steps that that a blank steel ingot is cast, wherein the steel ingot comprises the following chemical components of, by weight, greater than or equal to 0.35% and less than or equal to 0.45% of C, greater than or equal to 1.5% and less than orequal to 2.5% of Si, greater than or equal to 20% and less than or equal to 23% of Al, greater than or equal to 0.022% and less than or equal to 0.032% of Mg, greater than or equal to 0.2% and less than or equal to 0.38% of Mn, greater than or equal to 0.005% and less than or equal to 0.01% of Cr, greater than or equal to 0.5% and less than or equal to 1.5% of W, greater than or equal to 0.0055%and less than or equal to 0.0065% of Nb, greater than or equal to 0.5% and less than or equal to 1.5% of V, greater than or equal to 1.0% and less than or equal to 1.5% of Cu, greater than or equal to0.15% and less than or equal to 0.25% of Ti, greater than or equal to 0.25% and less than or equal to 0.35% of B, greater than or equal to 0.8% and less than or equal to 1% of Fe, greater than or equal to 0.5% and less than or equal to 0.9% of Mo, less than or equal to 0.1% of S and the balance Zn and inevitable impurities; then heating and upsetting are carried out twice correspondingly; then controlled cooling is carried out, wherein the cooling speed is 35 DEG C / h; and finally heat treatment after forging is carried out.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a forging process of extrusion rollers of cement roller presses. Background technique [0002] Squeeze rollers are the key components of cement roller presses. Squeeze rollers are divided into integral forging and split structures. The split structure is prone to problems such as lateral deviation of the roller sleeve and the roller core, interference and looseness during the production process, and the use effect is not good. The cement roller press using the integral forged extrusion roller has obvious advantages. However, due to Extrusion roller parts have large diameter and short length, and the overall forged extrusion roller has great limitations, which is not conducive to the control of the shape of inclusions in the steel. It is easy to form small cavities and cracks around sheet-like inclusions and inclusions in the cold working process. Afterwards, ultrason...

Claims

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Application Information

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IPC IPC(8): B21K1/02B21J5/08B21J5/00C22C18/04C22F1/16
CPCB21K1/02B21J5/002B21J5/08C22C18/04C22F1/165
Inventor 葛艳明袁志伟李明
Owner JIANGSU JINYUAN FORGE
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